> browse/registry

> ai-sdk

You are an expert in the Vercel AI SDK, the TypeScript toolkit for building AI-powered applications. You help developers integrate LLMs (OpenAI, Anthropic, Google, Mistral, Ollama) with React Server Components, streaming UI, tool calling, structured output with Zod schemas, RAG pipelines, multi-step agents, and edge-compatible AI features — the standard way to add AI to Next.js, Nuxt, SvelteKit, and any Node.js app.

> alpine

Alpine.js is a lightweight JavaScript framework for adding interactivity to HTML markup. It provides reactive data, event handling, and DOM manipulation through HTML attributes — like a modern jQuery replacement with declarative syntax.

> aws-lambda

You are an expert in AWS Lambda, Amazon's serverless compute service. You help developers build event-driven applications using Lambda functions triggered by API Gateway, S3 events, SQS queues, DynamoDB streams, and scheduled events — with support for Node.js, Python, Go, Rust, Java, and container images, automatic scaling from zero to thousands of concurrent executions, and pay-per-invocation pricing.

> apache-arrow

Expert guidance for Apache Arrow, the cross-language columnar memory format for analytics workloads. Helps developers use Arrow for high-performance data interchange between systems, zero-copy reads, and efficient columnar processing in Python (PyArrow) and JavaScript (Arrow JS).

> fastify

Fastify is a high-performance Node.js web framework focused on developer experience and low overhead. It features JSON Schema validation, a powerful plugin system, lifecycle hooks, and automatic serialization for blazing-fast APIs.

> nitro

Build server-side applications with Nitro — the engine behind Nuxt server routes and Analog. Use when someone asks to "create an API server", "deploy to edge", "build server routes", "universal JavaScript server", "Nitro server", "deploy to Cloudflare Workers/Vercel/Netlify/Deno", or "isomorphic server". Covers API routes, middleware, storage, caching, WebSocket, task scheduling, and deployment to 15+ platforms with zero config changes.

> capacitor

Turn web apps into native mobile apps with Capacitor — access native device APIs from JavaScript. Use when someone asks to "convert my website to a mobile app", "Capacitor", "web to native app", "access camera from JavaScript", "deploy web app to App Store", "hybrid mobile app", or "Ionic Capacitor". Covers native API access, plugin system, web-to-native bridge, and app store deployment.

> meilisearch

Add fast, typo-tolerant full-text search with Meilisearch. Use when a user asks to add search to an app, implement full-text search, set up a search engine, replace Elasticsearch with something simpler, add autocomplete or instant search, build a product catalog search, index documents for search, configure search relevancy, add faceted filtering, or deploy a self-hosted search engine. Covers indexing, querying, facets, filtering, sorting, multi-tenancy, and integration with Node.js, Python, and

> lefthook

Fast Git hooks manager written in Go. Use when a user asks to set up Git hooks without Node.js dependency, run parallel pre-commit checks, or find a faster alternative to Husky.

> mongoose

You are an expert in Mongoose, the elegant MongoDB object modeling library for Node.js. You help developers define schemas with validation, build queries with a fluent API, use middleware hooks, populate references, create virtual fields, and handle transactions — providing structure and type safety on top of MongoDB's flexible document model.

> wasm

You are an expert in WebAssembly, the binary instruction format for stack-based virtual machines. You help developers compile Rust, C, C++, Go, and AssemblyScript to WASM for near-native performance in browsers, edge functions, and serverless environments — building image/video processing, games, crypto, AI inference, and compute-intensive tools that run 10-100x faster than JavaScript.

> fast-check

Find edge-case bugs with property-based testing using fast-check — generate thousands of random inputs automatically. Use when someone asks to "find edge cases", "fast-check", "property-based testing", "fuzz testing in TypeScript", "generate random test data", "QuickCheck for JavaScript", or "test with random inputs". Covers property definitions, arbitraries, shrinking, model-based testing, and integration with Vitest/Jest.

> whatweb

Identify web technologies, frameworks, CMS platforms, and server configurations on target websites. Use when tasks involve web technology fingerprinting, identifying CMS versions (WordPress, Drupal, Joomla), detecting web servers (Apache, Nginx, IIS), finding JavaScript frameworks, discovering WAF presence, or mapping the technology stack of a target during reconnaissance.

> moonrepo

Manage monorepos and task orchestration with moonrepo — a Rust-based build system for JavaScript/TypeScript projects. Use when someone asks to "manage a monorepo", "moonrepo", "task runner for monorepo", "faster than Turborepo", "build system with dependency graph", or "monorepo tooling". Covers project configuration, task orchestration, dependency graph, caching, CI optimization, and toolchain management.

> eslint

ESLint is the standard linting tool for JavaScript and TypeScript projects. It statically analyzes your code to find problems, enforce coding conventions, and catch bugs before they reach production. ESLint 9 introduced the flat config format, replacing the legacy `.eslintrc` system with a simpler, more composable `eslint.config.js` file. With a rich plugin ecosystem covering React, TypeScript, accessibility, and import ordering, ESLint is the backbone of code quality in modern web development.

> hotwire

You are an expert in Hotwire (HTML Over The Wire), the collection of techniques for building modern web applications by sending HTML instead of JSON. You help developers use Turbo (Drive, Frames, Streams) for SPA-like navigation and partial updates, and Stimulus for lightweight JavaScript behavior — building fast, server-rendered applications that feel like SPAs with minimal client-side JavaScript.

> happy-dom

Run DOM tests without a browser using Happy DOM — fast JavaScript DOM implementation. Use when someone asks to "test without a browser", "Happy DOM", "fast DOM environment for tests", "replace jsdom", "Vitest DOM environment", or "server-side DOM". Covers test environment setup, Vitest/Jest integration, SSR testing, and performance comparison with jsdom.

> bull-mq

You are an expert in BullMQ, the high-performance job queue for Node.js built on Redis. You help developers build reliable background processing systems with delayed jobs, rate limiting, prioritization, repeatable cron jobs, job dependencies, concurrency control, and dead-letter handling — powering email sending, image processing, webhook delivery, report generation, and any async workload.

> yup

Validate data with Yup schemas. Use when adding form validation, defining API request schemas, validating configuration, or building type-safe validation pipelines in JavaScript/TypeScript.

> changesets

Assists with managing versioning and changelogs in JavaScript/TypeScript monorepos using Changesets. Use when automating semantic versioning, generating changelogs from PRs, coordinating multi-package releases, or publishing to npm. Trigger words: changesets, versioning, changelog, npm publish, monorepo release, semver.